Automatic damper control.



vJ. S. BRENNAN.

AUTOMATIC DAMPER CONTROL. APPLICATION FILED MAR. 6. 1917.

Patented Jan. 1,1918.

JWW

UNITED STATES PATENT ormen JOHN'S. BRENNAN, 0F MILWAUKEE, WISCONSIN.

AUTOMATIC DAMPER CONTROL.

Specification of Letters Patent.

Patented Jan. 1, 1918.

Application filed March 6, 1917. Serial No. 152,558.. A

To all. whom) it may concern Be it known that I, JOHN S. BRENNAN, a citizen of the United States, and resident of lllilw-aukee,.in. the county of. Milwaukeeand State of lVisconsin, have invented certainnew and useful Improvements in Automatic, Damperv Controls; and I do hereby declare that the followingis a full, clear, and exact description thereof.

My invention relates. to. new and useful improvements in devices for automatically: controlling the furnace dampers. of vapor; heating systems, and is more particularly directed to the provision of a device includ--'.

ing a storage tank, a leverlcarried:actuating-.. tank connected with the storage tank, and' connections between the leverand dampers,

whereby upon an. increase of pressure, in the system, water-will be driven. from the. stor-., age tank into the actuating tank to. procure, a rocking movement of the lever, and con-.,,

sequent actuation of the dampers.

It is in general the object of my invention to simplify thestructure and. 1ncrease-tl1e efficiency of devices ofth1s character.

It is morev particularly an object to provide an exceedingly simple and. economi-- cally constructedswivel joint between the storage tank and its means of communica-.

tion with the actuating tank.;

It is furtheran object in this connection to provide an arrangement whereby access of steam to points immediately adjacent. the swivelconnection is prevented, to thus preg vent possible swelling and consequent binding. ofthe connection-due to excessive heat imparted thereto,

Ajstill further object resides in the provision of-a single means of communication.

between-the storage tank and the main heatfi ing. system which provides for continuous. maintenance of vapor pressure in the tank and which also provides for dralnage of the particularly in the-novel combination, formation and arrangement of parts hereinafter described and pointed out'in theap-' pended claims.

.. In" the drawings;

Figure l is an elevational View of a preferred'embodiment of my damper controlling device, showing the draft and check dampers of a furnace diagrammatically associated therewith.

Fig. 2 is :a vertical sectional view through the storage tank 'of my device on the line 2-2 of Fig. 1.

Referring-now more particularly to the accompanying drawings, my device comprises a main or storage tank 5 closed at its top and provided with an intermediate partition 6 extending from its closed top to'a point adjacent its bottom and dividing the tank into communicating compartments A and B. Communicating with and extending from the compartment Bis a pipe 7 which extends, to asteam pipe 7 of the heating system, ortoany other yapor space thereof, such as thetop of the boiler. This pipe may be disposed jeither horizontally as shown, or it may incline downwardly whereby in both instances to provide a free drain age for the tank, and also provide for a free communication of steam or other vapor with the upper portion of the tank. Formed in the wallof the tank'in communication with the compartment A is an opening 8,

and projecting outwardly from this opening isa preferably integral nipple9 having its bore, greater than the bore of the opening whereby to form a shoulder conjunction therewith, and disposed in this nipple is a 1 pivot pipesection 10 having an annular; shoulder-on its inner end.

.pivot pipe section and threadedly engaged ,in the, nipple is a follower sleeve 11,"a-nd' packing-is disposed between thissleeve and the rib of the pivot pipe section. The outer endof the pivot pipe section is engaged in Mounted on the v a T12 from one end of which a pipe 13 ex tends to form one arm of the actuating 'leactuating tank 14:.

other end of the T and carries a preferably conventionally adj ustable counter-balancing weight 16.

17 designates conventio'nallya draft clamj. ver of my device, and the outer end of this I -pipe.13 is threaded into and supports an A rod 15 formingthe other arm. of tlie lever extends from the per. ofa furnace, and 18 designates a check damper of the chimney flue thereof, and secured to these dampers are chain sections 19 connected by an adjusting plate 20, the chain section of the check damper 18 extending upwardly and about suitable guide pulleys 21 andthen downwardly for attachment to the plate and this plate is provided with longitudinal series of apertures for selective engagement of a pin projecting laterally from the intermediate portion of the pipe arm 13 of the lever, and for holding the plate in desired adjusted position with respect to the pin, a spring finger 23 is pivoted to the pipe arm at one end and has its other end notched to receive the pin 22 and to resiliently press against the plate.

A'water glass 2a has its ends connected with the top and bottom portions of the compartment B of the storage tank. 7 Taking up now the operation of my device, the device is adjusted so that with the normal desired pressure of the heating sys tem the lever 1315 is inclined with its tank in a raised position, preferably with the draft damper closed and the check damper partly open. Upon increase of pressure in the system and consequently in the upper portion of thecompartment B of the storage tank, water is forced by such pressure into the compartment A and from thence through the pipe 18 into the actuating tank 14, and the pipe arm 13 of the lever becomes consequently weighted sufliciently to swing the lever and open the check damper 18, or close the draft damper 17 or actuate both dampers in accordance with the relative positions of the dampers and the degree of operative movement of the lever arm, such actuation of the dampers obviously serving in any instance to check the fire inthe furnace and consequently reduce the pressure of the system. Upon such reduction of pressure, the water will flow back into the storage tank and the lever and its connected dampers will move to aposition wherein the desired vapor pressure is maintained. By the provision of the plate 20 adjustably connected with the lever arm 13, desired relative adjustments of the draft and check dampers may be most readily effected. It is noted that the volume of the compartment B of thestorage tank 5 is equal to the volume of the actuating tank 14. Consequently upon a maximum occurrence of pressure filling the tank 1 1, thewater glass 24 would be practically emptied and thus by these equal volumes, the exact vapor prrssure may be read throughout the entire length of the water glass 24, it being noted that as usual in devices of this character the tank 14: normally has free communication with the atmosphere, and may be provided if desired with a conventionally designated valve 25 preferably of the float type to prevent its possible overflow under excessive pressure other means. r

conditions. Thus the compartment A of the storage tank 5 is at all times full of water and the accessof steam thereto is prevented to thus prevent possible excessive heating of the swivel joint afforded by the nipple 9 and pipe sectioirlfi), which might cause a binding of said parts interfering with free pivotal movement of the lever.

Inasmuch as steam or other vapor is.at all times disposed in the tank 5, the normal-1,75 rate of condensation serves to maintain a}, sufficient supply. of fluid therein, and by the, utilization of a single pipe communicating a with the upper portion of the tank and with* the vapor space of the heatingsyst-cm for so the drainage of said tank, the possibility of undesired variation of the level of the tank due to unusual conditions in the system is avoided without the use of check valves or What is claimed is: i a a 1. A controlling device of the class (16-1 scribed comprising the combination'with a boiler of a closed tank communicating at its upper end with the steam space of the boiler, a partition extending from the top o f'the. tank to a point adjacent its bottom, a lever including a pipe arm and a lateral pipe section communicating with the arm and pivoted to and communicating with the upper portion of the tank at the side of the partition opposite its communication with the boiler, a tank carried by and communicating with said pipe arm of the lever and heat control means for the boiler connected 7100 with said lever. V

2. A controlling device of the class clescribed comprising the combination with a boiler of a closed tank communicating at its upper end with the steam space of the boiler,

a partitionextending from the top of'the tank to a point adjacent its bottom, a lever including a pipe arm and alateral pipe section communicating with the arm, an annular rib on the free end of said pipe section, a nipple extending from the side of the partition opposite its communication with the boiler and receiving the lateral pipe sec.- tion, a sleeve on the pipe section threadedly engaged with the nipple, packing disposed between the sleeve and annular rib of the 5 pipe section, a tank carried by and coni- V municating with said vpipe arm of the lever and heat control means for the boiler connected with said lever. 3. A controlling device of the class dey scribed comprising the combination with a boiler of a closed tank communicating at its upper end with the steam space of the boiler, a partition extending from the top of the tank to a point adjacent its bottom, and dividing it into two communicating com- Q partments, a lever including a pipe arm and lateral pipe section communicating with the upper portion of one of the compartments,

means connecting the other compartment with the steam space of the boiler, a tank carried by and communicating with said pipe arm of the lever, the volumes of the tank and the last mentioned compartment being equal, a water glass communicating with the last named compartment, and heat control means for the boiler connected with said lever.

a. A controlling device of the class described comprising the combination with a boiler of a closed tank, a partition extending from the top of the tank to a point adjacent its bottom whereby to provide two communieating compartments, a pipe connecting the top of one compartment with the steam space of the boiler, a pivot mounted upon the wall of said tank and communicating with the other compartment, a lever swiveled to'said pivot and including a pipe arm communicating with said other compartment through the pivot and a rod arm, a counter-balanced weight adjustably carried by the rod arm, a tank carried by and communicating with said pipe arm, the volumes of said tank and the first mentioned compartment being equal, and heat controlled means for the boiler and adjustably connected with said lever, the water of the first mentioned compartment being adapted upon entrance thereto from the boiler of excessive steam pressure to force the water in said other compartment into the tank carried by said lever whereby to operate the heat controlled means, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin.

JOHN S. BRENNAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

